Enhancing the quality and transparency of qualitative research methods in health psychology History and background Since its launch in 1996, the British Journal of Health Psychology (BJHP) has been proud to publish high-quality research that has employed a variety of methodological and analytical approaches, including qualitative, quantitative, and mixed-methods research (for a glossary of terms, see Table 1). In 2018, approximately 1 in 3 published papers were qualitative or mixed-methods research. Over the past 8 years, the number of qualitative research papers received by the journal has steadily grown and we have published a large number of papers of high quality that have made a significant contribution to the field and the journal's reputation. For example, in 2017 our most cited paper was a qualitative evaluation of perceptions of human papillomavirus (HPV) and HPV vaccination in men who have sex with men (Nadarzynski et al., 2017). We want to continue to publish qualitative research of the highest quality, and to be sure that the editorial judgements that we are making about qualitative research are fair and transparent. 'Qualitative research' has an interesting history. It developed in UK psychology at a time when experiments were the dominant method and positivism was the dominant epistemology. The positivist approach was inappropriate for researchers who wanted to answer exploratory research questions, because it was not always possible to make predictions or hypotheses to test, which is the modus operandi in positivist research. As a consequence, many early qualitative methods textbooks in psychology took a critical stance (